Is a two-surface white filling covered by insurance?
Usually yes, as a basic service at 70 to 80%, but the number on the check depends on one plan rule. A two-surface white filling on a back tooth (code D2392) is a tooth-colored filling covering two sides of a molar or premolar. Many plans pay it at the two-surface silver rate (D2150) instead, and the patient owes the rest.
70 to 80%
Basic, downgrade decides the gap
Paid at D2150
Many plans pay this at the two-surface silver rate and leave the difference to the patient. The gap grows with every surface, so it is bigger here than on D2391.
Everyday filling
Two surfaces is among the most common back-tooth fillings, so this is where a wrong estimate shows up most. Get the downgrade answer right here first.
24 months
The usual replacement window, per surface. Two surfaces means two clocks; if either one is inside the window, expect a reduced or denied claim.
Before the visit
The downgrade changes the patient's number by real money. One check before the appointment shows which rate the plan pays, before the patient asks at checkout.
What would a real check show for this patient's D2392?
Pick a sample plan and type your per-tooth fee. This is the visibility a real-time check gives the desk for every actual patient, in under a second.
Eligibility readout · D2392
Sample- Coverage
- Active, basic covered at 80%, paid at the white filling fee
- Frequency
- Once per surface / 24 months
- Patient share
- Type your fee to see it
Estimate from a sample plan. A real check reads the actual plan in under a second.
When D2392 is the right code
- Back tooth, molar or premolar
- Tooth-colored filling
- Two surfaces of the same tooth, same day
- Both surface letters on the claim
- Neither surface filled in the last 24 months
Documentation payers expect
Tooth number with both surface letters and a chart note or X-ray on the decay. For plans that downgrade, a signed estimate showing the gap saves the argument later.
Why two-surface white fillings get denied (or downgraded)
What happens after the two-surface white filling
Two things follow. First, the EOB, where a downgrading plan pays the D2150 rate and moves the gap to the patient, larger than on a one-surface filling. Second, the tooth itself: a two-surface filling that fails inside 24 months is a redo on the patient, and one that fails later may become a crown (D2750) at 50%. Neither is a surprise when the desk quoted the downgrade and the major rate on treatment day, which takes knowing the plan, which takes one check.
D2392, quick answers
Is a two-surface white filling covered?
Usually, as a basic service at 70 to 80% on most plans, though many pay it at the two-surface silver rate (D2150) and leave the gap to the patient.
Why is the gap bigger than on a one-surface filling?
Because the difference between the white and silver fees grows with every surface. A two-surface downgrade costs the patient more than a one-surface one.
Can two one-surface fillings on the same tooth be billed instead?
Not the same day. Plans combine them into one two-surface code, silver or white, and reject the extra line.
What is the replacement rule?
Typically 24 months per surface. Either surface being recent can reduce or deny the claim.
Does D2392 need prior authorization?
Rarely. What it needs is a downgrade answer before the visit, which one check against the plan gives the desk.
More questions? Schedule 15 minutes with us and bring your toughest plan.
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Related: D2391 · D2393 · D2150
CDT is maintained by the American Dental Association. This page is Valian's own plain-English summary for front-desk teams, not official CDT descriptor text, and is not billing or clinical advice. Coverage patterns are common plan behaviors; every plan differs. Verify benefits before treatment.